./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash efe93c285b9cfe4b236eb7cc9957c6e5b1b94bff3322775b8e8d61a9769c319e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:43:15,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:43:15,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:43:15,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:43:15,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:43:15,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:43:15,413 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:43:15,415 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:43:15,416 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:43:15,417 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:43:15,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:43:15,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:43:15,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:43:15,422 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:43:15,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:43:15,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:43:15,425 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:43:15,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:43:15,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:43:15,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:43:15,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:43:15,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:43:15,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:43:15,437 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:43:15,440 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:43:15,441 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:43:15,441 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:43:15,442 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:43:15,443 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:43:15,444 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:43:15,444 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:43:15,445 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:43:15,446 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:43:15,446 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:43:15,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:43:15,448 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:43:15,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:43:15,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:43:15,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:43:15,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:43:15,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:43:15,451 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-06 22:43:15,473 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:43:15,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:43:15,474 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:43:15,474 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:43:15,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:43:15,474 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:43:15,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:43:15,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:43:15,475 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:43:15,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:43:15,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:43:15,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:43:15,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:43:15,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:43:15,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:43:15,476 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:43:15,476 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:43:15,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:43:15,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:43:15,477 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:43:15,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:43:15,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:43:15,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:43:15,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:43:15,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:43:15,477 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:43:15,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:43:15,478 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:43:15,478 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:43:15,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:43:15,478 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:43:15,478 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efe93c285b9cfe4b236eb7cc9957c6e5b1b94bff3322775b8e8d61a9769c319e [2021-12-06 22:43:15,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:43:15,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:43:15,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:43:15,688 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:43:15,689 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:43:15,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i [2021-12-06 22:43:15,734 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/data/d54990352/e74bf6e20270438393b29739e0cf9e07/FLAG84d2a18ef [2021-12-06 22:43:16,302 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:43:16,302 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i [2021-12-06 22:43:16,325 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/data/d54990352/e74bf6e20270438393b29739e0cf9e07/FLAG84d2a18ef [2021-12-06 22:43:16,735 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/data/d54990352/e74bf6e20270438393b29739e0cf9e07 [2021-12-06 22:43:16,740 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:43:16,743 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:43:16,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:43:16,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:43:16,753 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:43:16,753 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:43:16" (1/1) ... [2021-12-06 22:43:16,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eafab8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:43:16, skipping insertion in model container [2021-12-06 22:43:16,754 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:43:16" (1/1) ... [2021-12-06 22:43:16,759 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:43:16,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:43:17,003 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4489,4502] [2021-12-06 22:43:17,007 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4549,4562] [2021-12-06 22:43:17,595 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:17,596 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:17,596 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:17,596 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:17,597 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:17,607 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:17,607 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:17,609 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:17,609 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:17,921 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 22:43:17,922 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 22:43:17,922 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 22:43:17,923 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 22:43:17,924 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 22:43:17,925 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 22:43:17,925 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 22:43:17,926 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 22:43:17,926 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 22:43:17,926 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 22:43:18,063 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 22:43:18,148 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:18,149 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:18,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:43:18,257 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:43:18,271 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4489,4502] [2021-12-06 22:43:18,272 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/sv-benchmarks/c/aws-c-common/aws_byte_buf_eq_harness.i[4549,4562] [2021-12-06 22:43:18,303 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:18,303 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:18,304 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:18,304 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:18,305 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:18,311 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:18,312 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:18,313 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:18,313 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:18,340 WARN L610 FunctionHandler]: implicit declaration of function __atomic_load_n [2021-12-06 22:43:18,341 WARN L610 FunctionHandler]: implicit declaration of function __atomic_store_n [2021-12-06 22:43:18,341 WARN L610 FunctionHandler]: implicit declaration of function __atomic_exchange_n [2021-12-06 22:43:18,342 WARN L610 FunctionHandler]: implicit declaration of function __atomic_compare_exchange_n [2021-12-06 22:43:18,342 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_add [2021-12-06 22:43:18,343 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_sub [2021-12-06 22:43:18,343 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_or [2021-12-06 22:43:18,343 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_and [2021-12-06 22:43:18,343 WARN L610 FunctionHandler]: implicit declaration of function __atomic_fetch_xor [2021-12-06 22:43:18,344 WARN L610 FunctionHandler]: implicit declaration of function __atomic_thread_fence [2021-12-06 22:43:18,357 WARN L610 FunctionHandler]: implicit declaration of function __builtin_va_copy [2021-12-06 22:43:18,389 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:18,390 WARN L1533 CHandler]: Possible shadowing of function index [2021-12-06 22:43:18,421 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:43:18,590 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:43:18,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:43:18 WrapperNode [2021-12-06 22:43:18,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:43:18,591 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:43:18,591 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:43:18,591 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:43:18,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:43:18" (1/1) ... [2021-12-06 22:43:18,666 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:43:18" (1/1) ... [2021-12-06 22:43:18,725 INFO L137 Inliner]: procedures = 691, calls = 2666, calls flagged for inlining = 60, calls inlined = 6, statements flattened = 887 [2021-12-06 22:43:18,726 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:43:18,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:43:18,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:43:18,727 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:43:18,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:43:18" (1/1) ... [2021-12-06 22:43:18,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:43:18" (1/1) ... [2021-12-06 22:43:18,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:43:18" (1/1) ... [2021-12-06 22:43:18,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:43:18" (1/1) ... [2021-12-06 22:43:18,780 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:43:18" (1/1) ... [2021-12-06 22:43:18,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:43:18" (1/1) ... [2021-12-06 22:43:18,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:43:18" (1/1) ... [2021-12-06 22:43:18,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:43:18,800 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:43:18,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:43:18,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:43:18,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:43:18" (1/1) ... [2021-12-06 22:43:18,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:43:18,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:43:18,829 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:43:18,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:43:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_valid [2021-12-06 22:43:18,859 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_valid [2021-12-06 22:43:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-06 22:43:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 22:43:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_bool [2021-12-06 22:43:18,859 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_bool [2021-12-06 22:43:18,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 22:43:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 22:43:18,860 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 22:43:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 22:43:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:43:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure save_byte_from_array [2021-12-06 22:43:18,860 INFO L138 BoogieDeclarations]: Found implementation of procedure save_byte_from_array [2021-12-06 22:43:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 22:43:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure ensure_byte_buf_has_allocated_buffer_member [2021-12-06 22:43:18,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ensure_byte_buf_has_allocated_buffer_member [2021-12-06 22:43:18,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:43:18,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:43:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure bounded_malloc [2021-12-06 22:43:18,861 INFO L138 BoogieDeclarations]: Found implementation of procedure bounded_malloc [2021-12-06 22:43:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_from_buffer_matches [2021-12-06 22:43:18,861 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_from_buffer_matches [2021-12-06 22:43:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-06 22:43:18,861 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-06 22:43:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 22:43:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 22:43:18,861 INFO L130 BoogieDeclarations]: Found specification of procedure aws_array_eq [2021-12-06 22:43:18,862 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_array_eq [2021-12-06 22:43:18,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 22:43:18,862 INFO L130 BoogieDeclarations]: Found specification of procedure can_fail_allocator [2021-12-06 22:43:18,862 INFO L138 BoogieDeclarations]: Found implementation of procedure can_fail_allocator [2021-12-06 22:43:18,862 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_uint64_t [2021-12-06 22:43:18,862 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_uint64_t [2021-12-06 22:43:18,862 INFO L130 BoogieDeclarations]: Found specification of procedure aws_byte_buf_is_bounded [2021-12-06 22:43:18,862 INFO L138 BoogieDeclarations]: Found implementation of procedure aws_byte_buf_is_bounded [2021-12-06 22:43:18,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 22:43:18,862 INFO L130 BoogieDeclarations]: Found specification of procedure assert_byte_buf_equivalence [2021-12-06 22:43:18,863 INFO L138 BoogieDeclarations]: Found implementation of procedure assert_byte_buf_equivalence [2021-12-06 22:43:18,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:43:19,035 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:43:19,036 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:43:19,911 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:43:19,918 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:43:19,919 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 22:43:19,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:43:19 BoogieIcfgContainer [2021-12-06 22:43:19,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:43:19,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:43:19,923 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:43:19,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:43:19,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:43:16" (1/3) ... [2021-12-06 22:43:19,926 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db6ee1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:43:19, skipping insertion in model container [2021-12-06 22:43:19,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:43:18" (2/3) ... [2021-12-06 22:43:19,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db6ee1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:43:19, skipping insertion in model container [2021-12-06 22:43:19,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:43:19" (3/3) ... [2021-12-06 22:43:19,928 INFO L111 eAbstractionObserver]: Analyzing ICFG aws_byte_buf_eq_harness.i [2021-12-06 22:43:19,933 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:43:19,934 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 22:43:19,981 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:43:19,988 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 22:43:19,988 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 22:43:20,009 INFO L276 IsEmpty]: Start isEmpty. Operand has 153 states, 92 states have (on average 1.2282608695652173) internal successors, (113), 93 states have internal predecessors, (113), 46 states have call successors, (46), 13 states have call predecessors, (46), 13 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2021-12-06 22:43:20,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 22:43:20,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:43:20,023 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:43:20,024 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:43:20,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:43:20,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1419889978, now seen corresponding path program 1 times [2021-12-06 22:43:20,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:43:20,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319306414] [2021-12-06 22:43:20,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:20,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:43:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:20,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:43:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:20,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:20,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:43:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:20,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:20,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:43:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:20,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:20,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:43:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:20,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 22:43:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:20,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 22:43:20,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:20,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:43:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:20,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:43:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:20,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:43:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:20,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:43:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:20,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 22:43:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:20,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 22:43:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:20,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:43:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:20,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:20,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:20,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:20,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-06 22:43:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-06 22:43:20,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:43:20,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319306414] [2021-12-06 22:43:20,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319306414] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:43:20,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:43:20,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:43:20,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083252324] [2021-12-06 22:43:20,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:43:20,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:43:20,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:43:20,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:43:20,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:43:20,785 INFO L87 Difference]: Start difference. First operand has 153 states, 92 states have (on average 1.2282608695652173) internal successors, (113), 93 states have internal predecessors, (113), 46 states have call successors, (46), 13 states have call predecessors, (46), 13 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-06 22:43:21,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:43:21,128 INFO L93 Difference]: Finished difference Result 304 states and 439 transitions. [2021-12-06 22:43:21,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:43:21,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 113 [2021-12-06 22:43:21,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:43:21,141 INFO L225 Difference]: With dead ends: 304 [2021-12-06 22:43:21,141 INFO L226 Difference]: Without dead ends: 150 [2021-12-06 22:43:21,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:43:21,150 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 213 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:43:21,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 237 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:43:21,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-06 22:43:21,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-12-06 22:43:21,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 89 states have internal predecessors, (107), 46 states have call successors, (46), 13 states have call predecessors, (46), 13 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2021-12-06 22:43:21,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 198 transitions. [2021-12-06 22:43:21,194 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 198 transitions. Word has length 113 [2021-12-06 22:43:21,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:43:21,194 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 198 transitions. [2021-12-06 22:43:21,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-06 22:43:21,195 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 198 transitions. [2021-12-06 22:43:21,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-06 22:43:21,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:43:21,198 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:43:21,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:43:21,198 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:43:21,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:43:21,198 INFO L85 PathProgramCache]: Analyzing trace with hash -254215752, now seen corresponding path program 1 times [2021-12-06 22:43:21,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:43:21,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955339412] [2021-12-06 22:43:21,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:21,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:43:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:21,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:43:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:21,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:21,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:43:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:21,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:21,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:43:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:21,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:21,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:43:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:21,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-06 22:43:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:21,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 22:43:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:21,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:43:21,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:21,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:43:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:21,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:43:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:21,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:43:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:21,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 22:43:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:21,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 22:43:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:21,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:43:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:21,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:21,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:21,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-06 22:43:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-06 22:43:21,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:43:21,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955339412] [2021-12-06 22:43:21,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955339412] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:43:21,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352641143] [2021-12-06 22:43:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:21,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:21,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:43:21,522 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:43:21,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:43:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:21,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 2776 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 22:43:21,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:43:22,175 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-06 22:43:22,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:43:22,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352641143] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:43:22,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:43:22,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2021-12-06 22:43:22,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859704076] [2021-12-06 22:43:22,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:43:22,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:43:22,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:43:22,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:43:22,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:43:22,180 INFO L87 Difference]: Start difference. First operand 148 states and 198 transitions. Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-06 22:43:22,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:43:22,353 INFO L93 Difference]: Finished difference Result 292 states and 395 transitions. [2021-12-06 22:43:22,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:43:22,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 113 [2021-12-06 22:43:22,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:43:22,356 INFO L225 Difference]: With dead ends: 292 [2021-12-06 22:43:22,356 INFO L226 Difference]: Without dead ends: 151 [2021-12-06 22:43:22,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-12-06 22:43:22,358 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 214 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:43:22,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 433 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:43:22,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-06 22:43:22,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-12-06 22:43:22,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 90 states have (on average 1.211111111111111) internal successors, (109), 92 states have internal predecessors, (109), 46 states have call successors, (46), 13 states have call predecessors, (46), 14 states have return successors, (51), 45 states have call predecessors, (51), 45 states have call successors, (51) [2021-12-06 22:43:22,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 206 transitions. [2021-12-06 22:43:22,376 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 206 transitions. Word has length 113 [2021-12-06 22:43:22,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:43:22,377 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 206 transitions. [2021-12-06 22:43:22,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-06 22:43:22,377 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 206 transitions. [2021-12-06 22:43:22,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-06 22:43:22,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:43:22,379 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:43:22,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:43:22,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:22,580 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:43:22,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:43:22,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1731779843, now seen corresponding path program 1 times [2021-12-06 22:43:22,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:43:22,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299742222] [2021-12-06 22:43:22,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:22,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:43:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:22,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:43:22,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:22,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:22,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:43:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:22,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:22,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:43:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:22,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:22,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:43:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:22,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 22:43:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:22,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:43:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:22,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:43:22,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:22,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:43:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:22,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:43:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:22,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 22:43:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:22,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 22:43:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:22,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:43:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:22,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 22:43:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:22,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:22,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:22,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-06 22:43:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-12-06 22:43:22,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:43:22,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299742222] [2021-12-06 22:43:22,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299742222] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:43:22,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890717931] [2021-12-06 22:43:22,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:22,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:22,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:43:22,925 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:43:22,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:43:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:23,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 2793 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 22:43:23,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:43:23,394 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 22:43:23,395 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:43:23,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890717931] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:43:23,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:43:23,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-12-06 22:43:23,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012352864] [2021-12-06 22:43:23,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:43:23,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:43:23,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:43:23,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:43:23,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:43:23,397 INFO L87 Difference]: Start difference. First operand 151 states and 206 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-06 22:43:23,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:43:23,582 INFO L93 Difference]: Finished difference Result 247 states and 339 transitions. [2021-12-06 22:43:23,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:43:23,583 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) Word has length 119 [2021-12-06 22:43:23,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:43:23,585 INFO L225 Difference]: With dead ends: 247 [2021-12-06 22:43:23,585 INFO L226 Difference]: Without dead ends: 151 [2021-12-06 22:43:23,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-12-06 22:43:23,586 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 229 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:43:23,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 570 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:43:23,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-06 22:43:23,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-12-06 22:43:23,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 90 states have (on average 1.211111111111111) internal successors, (109), 92 states have internal predecessors, (109), 46 states have call successors, (46), 13 states have call predecessors, (46), 14 states have return successors, (49), 45 states have call predecessors, (49), 45 states have call successors, (49) [2021-12-06 22:43:23,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 204 transitions. [2021-12-06 22:43:23,601 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 204 transitions. Word has length 119 [2021-12-06 22:43:23,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:43:23,601 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 204 transitions. [2021-12-06 22:43:23,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 states have internal predecessors, (56), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-06 22:43:23,601 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 204 transitions. [2021-12-06 22:43:23,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-06 22:43:23,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:43:23,603 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:43:23,626 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 22:43:23,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:23,804 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:43:23,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:43:23,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1773749607, now seen corresponding path program 2 times [2021-12-06 22:43:23,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:43:23,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514344420] [2021-12-06 22:43:23,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:23,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:43:23,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:23,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:43:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:23,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:23,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:23,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:43:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:23,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:23,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:43:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:23,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:23,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:43:23,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:24,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 22:43:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:24,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:43:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:24,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:43:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:24,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:43:24,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:24,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:43:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:24,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 22:43:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:24,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:43:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:24,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 22:43:24,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:24,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 22:43:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:24,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:24,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:24,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 22:43:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-06 22:43:24,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:43:24,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514344420] [2021-12-06 22:43:24,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514344420] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:43:24,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129143534] [2021-12-06 22:43:24,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:43:24,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:24,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:43:24,148 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:43:24,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:43:24,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 22:43:24,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:43:24,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 2326 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 22:43:24,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:43:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-06 22:43:24,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:43:24,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129143534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:43:24,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:43:24,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2021-12-06 22:43:24,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541503706] [2021-12-06 22:43:24,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:43:24,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 22:43:24,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:43:24,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 22:43:24,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-12-06 22:43:24,571 INFO L87 Difference]: Start difference. First operand 151 states and 204 transitions. Second operand has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-06 22:43:24,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:43:24,623 INFO L93 Difference]: Finished difference Result 163 states and 223 transitions. [2021-12-06 22:43:24,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 22:43:24,623 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 131 [2021-12-06 22:43:24,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:43:24,625 INFO L225 Difference]: With dead ends: 163 [2021-12-06 22:43:24,625 INFO L226 Difference]: Without dead ends: 161 [2021-12-06 22:43:24,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:43:24,627 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 22 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:43:24,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 1358 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:43:24,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-06 22:43:24,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-12-06 22:43:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 96 states have (on average 1.1979166666666667) internal successors, (115), 99 states have internal predecessors, (115), 47 states have call successors, (47), 14 states have call predecessors, (47), 16 states have return successors, (58), 46 states have call predecessors, (58), 46 states have call successors, (58) [2021-12-06 22:43:24,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 220 transitions. [2021-12-06 22:43:24,641 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 220 transitions. Word has length 131 [2021-12-06 22:43:24,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:43:24,642 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 220 transitions. [2021-12-06 22:43:24,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.142857142857143) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-06 22:43:24,642 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 220 transitions. [2021-12-06 22:43:24,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-06 22:43:24,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:43:24,643 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:43:24,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-06 22:43:24,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:24,845 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:43:24,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:43:24,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1277784929, now seen corresponding path program 1 times [2021-12-06 22:43:24,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:43:24,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748692497] [2021-12-06 22:43:24,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:24,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:43:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:25,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:43:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:25,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:25,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:43:25,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:25,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:25,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:43:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:25,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:25,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:43:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:25,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 22:43:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:25,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:43:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:25,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:43:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:25,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:43:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:25,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:43:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:25,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 22:43:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:25,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:43:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:25,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 22:43:25,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:25,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 22:43:25,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:25,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:25,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:25,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 22:43:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-12-06 22:43:25,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:43:25,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748692497] [2021-12-06 22:43:25,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748692497] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:43:25,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484844403] [2021-12-06 22:43:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:25,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:25,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:43:25,251 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:43:25,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 22:43:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:25,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 2839 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 22:43:25,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:43:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-06 22:43:25,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:43:25,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484844403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:43:25,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:43:25,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2021-12-06 22:43:25,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997962068] [2021-12-06 22:43:25,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:43:25,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:43:25,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:43:25,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:43:25,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:43:25,767 INFO L87 Difference]: Start difference. First operand 160 states and 220 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-06 22:43:25,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:43:25,967 INFO L93 Difference]: Finished difference Result 280 states and 386 transitions. [2021-12-06 22:43:25,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:43:25,968 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 135 [2021-12-06 22:43:25,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:43:25,970 INFO L225 Difference]: With dead ends: 280 [2021-12-06 22:43:25,970 INFO L226 Difference]: Without dead ends: 157 [2021-12-06 22:43:25,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-12-06 22:43:25,971 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 228 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:43:25,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 701 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:43:25,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-06 22:43:25,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-12-06 22:43:25,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 94 states have (on average 1.1914893617021276) internal successors, (112), 96 states have internal predecessors, (112), 47 states have call successors, (47), 14 states have call predecessors, (47), 15 states have return successors, (54), 46 states have call predecessors, (54), 46 states have call successors, (54) [2021-12-06 22:43:25,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 213 transitions. [2021-12-06 22:43:25,986 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 213 transitions. Word has length 135 [2021-12-06 22:43:25,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:43:25,986 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 213 transitions. [2021-12-06 22:43:25,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2021-12-06 22:43:25,986 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 213 transitions. [2021-12-06 22:43:25,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-06 22:43:25,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:43:25,988 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:43:26,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 22:43:26,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:26,190 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:43:26,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:43:26,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1196248684, now seen corresponding path program 1 times [2021-12-06 22:43:26,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:43:26,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348336664] [2021-12-06 22:43:26,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:26,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:43:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:26,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:43:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:26,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:26,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:43:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:26,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:26,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:43:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:26,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:26,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:43:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:26,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 22:43:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:26,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:43:26,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:26,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:43:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:26,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:43:26,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:26,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:43:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:26,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 22:43:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:26,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:43:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:26,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 22:43:26,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:26,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:43:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:26,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:26,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:26,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-06 22:43:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-06 22:43:26,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:43:26,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348336664] [2021-12-06 22:43:26,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348336664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:43:26,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:43:26,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 22:43:26,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188311307] [2021-12-06 22:43:26,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:43:26,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 22:43:26,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:43:26,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 22:43:26,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:43:26,727 INFO L87 Difference]: Start difference. First operand 157 states and 213 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-06 22:43:27,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:43:27,320 INFO L93 Difference]: Finished difference Result 334 states and 471 transitions. [2021-12-06 22:43:27,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:43:27,321 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) Word has length 141 [2021-12-06 22:43:27,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:43:27,323 INFO L225 Difference]: With dead ends: 334 [2021-12-06 22:43:27,323 INFO L226 Difference]: Without dead ends: 184 [2021-12-06 22:43:27,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:43:27,325 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 139 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:43:27,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 490 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:43:27,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-12-06 22:43:27,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 162. [2021-12-06 22:43:27,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 99 states have (on average 1.202020202020202) internal successors, (119), 101 states have internal predecessors, (119), 47 states have call successors, (47), 14 states have call predecessors, (47), 15 states have return successors, (54), 46 states have call predecessors, (54), 46 states have call successors, (54) [2021-12-06 22:43:27,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 220 transitions. [2021-12-06 22:43:27,343 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 220 transitions. Word has length 141 [2021-12-06 22:43:27,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:43:27,343 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 220 transitions. [2021-12-06 22:43:27,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (20), 5 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-06 22:43:27,344 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 220 transitions. [2021-12-06 22:43:27,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-06 22:43:27,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:43:27,346 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:43:27,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 22:43:27,346 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:43:27,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:43:27,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1454414122, now seen corresponding path program 1 times [2021-12-06 22:43:27,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:43:27,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028168196] [2021-12-06 22:43:27,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:27,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:43:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:27,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:43:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:27,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:27,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:43:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:27,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:27,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:43:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:27,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:27,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:43:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:27,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 22:43:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:27,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:43:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:27,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:43:27,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:27,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:43:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:28,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:43:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:28,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 22:43:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:28,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:43:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:28,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 22:43:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:28,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:43:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:28,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:28,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:28,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-06 22:43:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-12-06 22:43:28,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:43:28,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028168196] [2021-12-06 22:43:28,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028168196] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:43:28,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474426497] [2021-12-06 22:43:28,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:28,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:28,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:43:28,259 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:43:28,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 22:43:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:28,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 2851 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-06 22:43:28,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:43:28,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:43:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 22:43:29,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:43:29,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474426497] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:43:29,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:43:29,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [21] total 32 [2021-12-06 22:43:29,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306906711] [2021-12-06 22:43:29,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:43:29,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 22:43:29,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:43:29,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 22:43:29,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2021-12-06 22:43:29,166 INFO L87 Difference]: Start difference. First operand 162 states and 220 transitions. Second operand has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-12-06 22:43:29,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:43:29,350 INFO L93 Difference]: Finished difference Result 340 states and 457 transitions. [2021-12-06 22:43:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 22:43:29,350 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 141 [2021-12-06 22:43:29,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:43:29,352 INFO L225 Difference]: With dead ends: 340 [2021-12-06 22:43:29,353 INFO L226 Difference]: Without dead ends: 181 [2021-12-06 22:43:29,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 22:43:29,355 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 25 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:43:29,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 1438 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2021-12-06 22:43:29,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-06 22:43:29,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-12-06 22:43:29,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 117 states have (on average 1.2136752136752136) internal successors, (142), 119 states have internal predecessors, (142), 47 states have call successors, (47), 15 states have call predecessors, (47), 16 states have return successors, (54), 46 states have call predecessors, (54), 46 states have call successors, (54) [2021-12-06 22:43:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 243 transitions. [2021-12-06 22:43:29,371 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 243 transitions. Word has length 141 [2021-12-06 22:43:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:43:29,371 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 243 transitions. [2021-12-06 22:43:29,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.416666666666667) internal successors, (65), 10 states have internal predecessors, (65), 5 states have call successors, (20), 3 states have call predecessors, (20), 5 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-12-06 22:43:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 243 transitions. [2021-12-06 22:43:29,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-06 22:43:29,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:43:29,374 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:43:29,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 22:43:29,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:29,575 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:43:29,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:43:29,575 INFO L85 PathProgramCache]: Analyzing trace with hash -578979924, now seen corresponding path program 1 times [2021-12-06 22:43:29,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:43:29,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160654162] [2021-12-06 22:43:29,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:29,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:43:29,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:29,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:43:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:29,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:29,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:43:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:29,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:29,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:43:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:29,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:29,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:43:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:29,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-06 22:43:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:29,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:43:29,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:29,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:43:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:29,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:43:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:29,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:43:29,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:29,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-06 22:43:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:29,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:43:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:29,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 22:43:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:29,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:43:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:29,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:29,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:29,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-06 22:43:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-12-06 22:43:29,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:43:29,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160654162] [2021-12-06 22:43:29,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160654162] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:43:29,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590149435] [2021-12-06 22:43:29,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:29,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:29,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:43:29,812 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:43:29,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 22:43:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:30,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 2846 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 22:43:30,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:43:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-06 22:43:30,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:43:30,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590149435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:43:30,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:43:30,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-06 22:43:30,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262822762] [2021-12-06 22:43:30,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:43:30,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:43:30,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:43:30,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:43:30,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:43:30,272 INFO L87 Difference]: Start difference. First operand 181 states and 243 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-06 22:43:30,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:43:30,292 INFO L93 Difference]: Finished difference Result 349 states and 476 transitions. [2021-12-06 22:43:30,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:43:30,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 141 [2021-12-06 22:43:30,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:43:30,294 INFO L225 Difference]: With dead ends: 349 [2021-12-06 22:43:30,294 INFO L226 Difference]: Without dead ends: 190 [2021-12-06 22:43:30,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:43:30,295 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 20 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:43:30,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 583 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:43:30,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-12-06 22:43:30,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 173. [2021-12-06 22:43:30,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 110 states have (on average 1.209090909090909) internal successors, (133), 111 states have internal predecessors, (133), 47 states have call successors, (47), 15 states have call predecessors, (47), 15 states have return successors, (53), 46 states have call predecessors, (53), 46 states have call successors, (53) [2021-12-06 22:43:30,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 233 transitions. [2021-12-06 22:43:30,305 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 233 transitions. Word has length 141 [2021-12-06 22:43:30,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:43:30,305 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 233 transitions. [2021-12-06 22:43:30,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-06 22:43:30,306 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 233 transitions. [2021-12-06 22:43:30,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-06 22:43:30,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:43:30,307 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:43:30,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 22:43:30,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:30,508 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:43:30,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:43:30,508 INFO L85 PathProgramCache]: Analyzing trace with hash -2073865936, now seen corresponding path program 2 times [2021-12-06 22:43:30,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:43:30,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427829345] [2021-12-06 22:43:30,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:30,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:43:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:30,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:43:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:30,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:30,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:43:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:30,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:30,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:43:30,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:30,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:30,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:43:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:30,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-06 22:43:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:30,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-06 22:43:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:30,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-06 22:43:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:30,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-06 22:43:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:30,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-06 22:43:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:30,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-06 22:43:30,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:30,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-06 22:43:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:30,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-06 22:43:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:30,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-06 22:43:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:30,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:30,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:30,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-06 22:43:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:30,825 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-06 22:43:30,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:43:30,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427829345] [2021-12-06 22:43:30,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427829345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:43:30,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265711923] [2021-12-06 22:43:30,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:43:30,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:30,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:43:30,834 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:43:30,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 22:43:31,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:43:31,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:43:31,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 2858 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 22:43:31,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:43:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-06 22:43:31,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:43:31,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265711923] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:43:31,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:43:31,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2021-12-06 22:43:31,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868566308] [2021-12-06 22:43:31,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:43:31,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 22:43:31,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:43:31,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 22:43:31,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:43:31,886 INFO L87 Difference]: Start difference. First operand 173 states and 233 transitions. Second operand has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-06 22:43:31,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:43:31,994 INFO L93 Difference]: Finished difference Result 337 states and 457 transitions. [2021-12-06 22:43:31,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:43:31,994 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 145 [2021-12-06 22:43:31,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:43:31,996 INFO L225 Difference]: With dead ends: 337 [2021-12-06 22:43:31,996 INFO L226 Difference]: Without dead ends: 178 [2021-12-06 22:43:31,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 178 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:43:31,997 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 12 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:43:31,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1468 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:43:31,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-06 22:43:32,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-12-06 22:43:32,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 114 states have (on average 1.2017543859649122) internal successors, (137), 116 states have internal predecessors, (137), 47 states have call successors, (47), 15 states have call predecessors, (47), 16 states have return successors, (60), 46 states have call predecessors, (60), 46 states have call successors, (60) [2021-12-06 22:43:32,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 244 transitions. [2021-12-06 22:43:32,006 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 244 transitions. Word has length 145 [2021-12-06 22:43:32,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:43:32,006 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 244 transitions. [2021-12-06 22:43:32,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-06 22:43:32,007 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 244 transitions. [2021-12-06 22:43:32,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-06 22:43:32,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:43:32,008 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:43:32,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 22:43:32,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:32,209 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:43:32,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:43:32,209 INFO L85 PathProgramCache]: Analyzing trace with hash 183727797, now seen corresponding path program 1 times [2021-12-06 22:43:32,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:43:32,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120183513] [2021-12-06 22:43:32,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:32,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:43:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:32,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:43:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:32,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:32,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:43:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:32,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:32,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:43:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:32,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:32,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:43:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:32,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:43:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:32,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:43:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:32,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:43:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:32,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:43:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:32,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 22:43:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:32,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:43:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:32,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 22:43:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:32,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:43:32,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:32,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 22:43:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:32,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:32,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:32,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-06 22:43:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2021-12-06 22:43:32,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:43:32,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120183513] [2021-12-06 22:43:32,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120183513] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:43:32,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117591418] [2021-12-06 22:43:32,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:32,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:32,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:43:32,447 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:43:32,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 22:43:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:32,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 2863 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 22:43:32,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:43:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-06 22:43:32,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:43:32,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117591418] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:43:32,872 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:43:32,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-06 22:43:32,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144640080] [2021-12-06 22:43:32,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:43:32,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:43:32,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:43:32,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:43:32,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:43:32,873 INFO L87 Difference]: Start difference. First operand 178 states and 244 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-06 22:43:32,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:43:32,891 INFO L93 Difference]: Finished difference Result 347 states and 481 transitions. [2021-12-06 22:43:32,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:43:32,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 147 [2021-12-06 22:43:32,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:43:32,893 INFO L225 Difference]: With dead ends: 347 [2021-12-06 22:43:32,893 INFO L226 Difference]: Without dead ends: 181 [2021-12-06 22:43:32,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:43:32,894 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 9 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:43:32,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 576 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:43:32,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-12-06 22:43:32,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2021-12-06 22:43:32,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 114 states have (on average 1.1842105263157894) internal successors, (135), 116 states have internal predecessors, (135), 47 states have call successors, (47), 15 states have call predecessors, (47), 16 states have return successors, (60), 46 states have call predecessors, (60), 46 states have call successors, (60) [2021-12-06 22:43:32,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 242 transitions. [2021-12-06 22:43:32,903 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 242 transitions. Word has length 147 [2021-12-06 22:43:32,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:43:32,903 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 242 transitions. [2021-12-06 22:43:32,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-06 22:43:32,904 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 242 transitions. [2021-12-06 22:43:32,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-06 22:43:32,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:43:32,905 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:43:32,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 22:43:33,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 22:43:33,107 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:43:33,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:43:33,108 INFO L85 PathProgramCache]: Analyzing trace with hash -840353543, now seen corresponding path program 1 times [2021-12-06 22:43:33,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:43:33,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558790659] [2021-12-06 22:43:33,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:33,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:43:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:33,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:43:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:33,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:33,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:43:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:33,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:33,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:43:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:33,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:33,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:43:33,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:33,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:43:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:33,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:43:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:33,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:43:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:33,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:43:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:33,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 22:43:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:33,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:43:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:33,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 22:43:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:33,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:43:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:33,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 22:43:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:33,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:33,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:33,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-06 22:43:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-12-06 22:43:33,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:43:33,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558790659] [2021-12-06 22:43:33,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558790659] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:43:33,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720078411] [2021-12-06 22:43:33,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:33,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:33,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:43:33,334 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:43:33,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 22:43:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:33,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 2865 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 22:43:33,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:43:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-12-06 22:43:33,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:43:33,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720078411] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:43:33,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:43:33,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-12-06 22:43:33,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248766659] [2021-12-06 22:43:33,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:43:33,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:43:33,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:43:33,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:43:33,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:43:33,712 INFO L87 Difference]: Start difference. First operand 178 states and 242 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-06 22:43:33,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:43:33,730 INFO L93 Difference]: Finished difference Result 353 states and 497 transitions. [2021-12-06 22:43:33,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:43:33,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 147 [2021-12-06 22:43:33,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:43:33,732 INFO L225 Difference]: With dead ends: 353 [2021-12-06 22:43:33,732 INFO L226 Difference]: Without dead ends: 187 [2021-12-06 22:43:33,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:43:33,734 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 34 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:43:33,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 574 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:43:33,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-06 22:43:33,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 174. [2021-12-06 22:43:33,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 110 states have (on average 1.1636363636363636) internal successors, (128), 112 states have internal predecessors, (128), 47 states have call successors, (47), 15 states have call predecessors, (47), 16 states have return successors, (60), 46 states have call predecessors, (60), 46 states have call successors, (60) [2021-12-06 22:43:33,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 235 transitions. [2021-12-06 22:43:33,746 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 235 transitions. Word has length 147 [2021-12-06 22:43:33,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:43:33,747 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 235 transitions. [2021-12-06 22:43:33,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-06 22:43:33,747 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 235 transitions. [2021-12-06 22:43:33,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-06 22:43:33,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:43:33,749 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:43:33,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 22:43:33,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 22:43:33,950 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:43:33,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:43:33,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1878938117, now seen corresponding path program 1 times [2021-12-06 22:43:33,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:43:33,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228296640] [2021-12-06 22:43:33,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:33,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:43:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:34,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:43:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:34,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:34,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:43:34,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:34,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:34,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:43:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:34,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:34,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:43:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:34,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:43:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:34,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:43:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:34,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:43:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:34,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:43:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:34,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 22:43:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:34,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:43:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:34,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 22:43:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:34,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:43:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:34,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 22:43:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:34,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:34,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:34,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-06 22:43:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-06 22:43:34,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:43:34,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228296640] [2021-12-06 22:43:34,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228296640] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:43:34,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203430693] [2021-12-06 22:43:34,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:34,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:34,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:43:34,656 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:43:34,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 22:43:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:34,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 2860 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-06 22:43:34,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:43:35,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:43:35,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-12-06 22:43:35,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:43:35,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:43:35,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:43:35,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2021-12-06 22:43:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 22:43:35,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:43:35,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203430693] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:43:35,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:43:35,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [16] total 31 [2021-12-06 22:43:35,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896841040] [2021-12-06 22:43:35,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:43:35,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 22:43:35,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:43:35,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 22:43:35,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=849, Unknown=0, NotChecked=0, Total=930 [2021-12-06 22:43:35,906 INFO L87 Difference]: Start difference. First operand 174 states and 235 transitions. Second operand has 17 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 8 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-12-06 22:43:36,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:43:36,400 INFO L93 Difference]: Finished difference Result 360 states and 485 transitions. [2021-12-06 22:43:36,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 22:43:36,401 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 8 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 147 [2021-12-06 22:43:36,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:43:36,402 INFO L225 Difference]: With dead ends: 360 [2021-12-06 22:43:36,402 INFO L226 Difference]: Without dead ends: 247 [2021-12-06 22:43:36,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 168 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 22:43:36,404 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 78 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 401 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:43:36,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 1051 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 594 Invalid, 0 Unknown, 401 Unchecked, 0.4s Time] [2021-12-06 22:43:36,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-12-06 22:43:36,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 231. [2021-12-06 22:43:36,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 154 states have (on average 1.1623376623376624) internal successors, (179), 159 states have internal predecessors, (179), 54 states have call successors, (54), 18 states have call predecessors, (54), 22 states have return successors, (77), 53 states have call predecessors, (77), 53 states have call successors, (77) [2021-12-06 22:43:36,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 310 transitions. [2021-12-06 22:43:36,418 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 310 transitions. Word has length 147 [2021-12-06 22:43:36,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:43:36,419 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 310 transitions. [2021-12-06 22:43:36,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 8 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-12-06 22:43:36,419 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 310 transitions. [2021-12-06 22:43:36,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-06 22:43:36,420 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:43:36,420 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:43:36,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 22:43:36,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 22:43:36,621 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:43:36,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:43:36,621 INFO L85 PathProgramCache]: Analyzing trace with hash 382635133, now seen corresponding path program 1 times [2021-12-06 22:43:36,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:43:36,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048961534] [2021-12-06 22:43:36,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:36,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:43:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:36,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:43:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:36,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:36,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:43:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:36,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:36,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:43:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:36,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:36,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:43:36,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:36,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:43:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:36,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:43:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:36,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:43:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:36,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:43:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:36,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 22:43:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:37,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:43:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:37,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 22:43:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:37,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 22:43:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:37,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 22:43:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:37,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:37,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:37,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-06 22:43:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-06 22:43:37,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:43:37,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048961534] [2021-12-06 22:43:37,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048961534] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:43:37,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944782308] [2021-12-06 22:43:37,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:37,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:37,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:43:37,209 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:43:37,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 22:43:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:37,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 2865 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 22:43:37,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:43:37,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:43:37,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:43:37,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:43:37,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:43:37,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:43:37,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:43:37,838 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 22:43:37,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 48 [2021-12-06 22:43:38,493 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 118 proven. 18 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 22:43:38,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:43:41,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944782308] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:43:41,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:43:41,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-12-06 22:43:41,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300534079] [2021-12-06 22:43:41,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:43:41,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 22:43:41,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:43:41,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 22:43:41,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1149, Unknown=1, NotChecked=0, Total=1260 [2021-12-06 22:43:41,021 INFO L87 Difference]: Start difference. First operand 231 states and 310 transitions. Second operand has 29 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 13 states have call successors, (37), 7 states have call predecessors, (37), 8 states have return successors, (35), 9 states have call predecessors, (35), 13 states have call successors, (35) [2021-12-06 22:43:45,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:43:45,225 INFO L93 Difference]: Finished difference Result 684 states and 1116 transitions. [2021-12-06 22:43:45,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 22:43:45,226 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 13 states have call successors, (37), 7 states have call predecessors, (37), 8 states have return successors, (35), 9 states have call predecessors, (35), 13 states have call successors, (35) Word has length 147 [2021-12-06 22:43:45,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:43:45,230 INFO L225 Difference]: With dead ends: 684 [2021-12-06 22:43:45,230 INFO L226 Difference]: Without dead ends: 571 [2021-12-06 22:43:45,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 259 SyntacticMatches, 10 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=451, Invalid=4104, Unknown=1, NotChecked=0, Total=4556 [2021-12-06 22:43:45,232 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 607 mSDsluCounter, 1561 mSDsCounter, 0 mSdLazyCounter, 4751 mSolverCounterSat, 737 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 6156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 737 IncrementalHoareTripleChecker+Valid, 4751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 668 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:43:45,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 1810 Invalid, 6156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [737 Valid, 4751 Invalid, 0 Unknown, 668 Unchecked, 3.2s Time] [2021-12-06 22:43:45,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-06 22:43:45,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 353. [2021-12-06 22:43:45,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 233 states have (on average 1.145922746781116) internal successors, (267), 243 states have internal predecessors, (267), 89 states have call successors, (89), 22 states have call predecessors, (89), 30 states have return successors, (170), 87 states have call predecessors, (170), 88 states have call successors, (170) [2021-12-06 22:43:45,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 526 transitions. [2021-12-06 22:43:45,263 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 526 transitions. Word has length 147 [2021-12-06 22:43:45,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:43:45,264 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 526 transitions. [2021-12-06 22:43:45,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 5.52) internal successors, (138), 25 states have internal predecessors, (138), 13 states have call successors, (37), 7 states have call predecessors, (37), 8 states have return successors, (35), 9 states have call predecessors, (35), 13 states have call successors, (35) [2021-12-06 22:43:45,264 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 526 transitions. [2021-12-06 22:43:45,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-06 22:43:45,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:43:45,266 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:43:45,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 22:43:45,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:45,467 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:43:45,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:43:45,467 INFO L85 PathProgramCache]: Analyzing trace with hash 856849283, now seen corresponding path program 2 times [2021-12-06 22:43:45,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:43:45,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382693882] [2021-12-06 22:43:45,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:45,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:43:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:45,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:43:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:45,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:45,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:43:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:45,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:45,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:43:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:45,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:45,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:45,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:43:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:45,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:43:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:45,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:43:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:45,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:43:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:45,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:43:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:45,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 22:43:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:45,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:43:45,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:45,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 22:43:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:45,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-06 22:43:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:45,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-06 22:43:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:45,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:45,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:45,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-06 22:43:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-06 22:43:45,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:43:45,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382693882] [2021-12-06 22:43:45,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382693882] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:43:45,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990946188] [2021-12-06 22:43:45,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:43:45,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:45,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:43:45,751 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:43:45,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 22:43:46,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:43:46,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:43:46,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 2862 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 22:43:46,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:43:46,755 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-12-06 22:43:46,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:43:46,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990946188] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:43:46,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:43:46,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2021-12-06 22:43:46,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459926827] [2021-12-06 22:43:46,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:43:46,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 22:43:46,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:43:46,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 22:43:46,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:43:46,757 INFO L87 Difference]: Start difference. First operand 353 states and 526 transitions. Second operand has 9 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-06 22:43:46,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:43:46,860 INFO L93 Difference]: Finished difference Result 533 states and 797 transitions. [2021-12-06 22:43:46,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:43:46,861 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 151 [2021-12-06 22:43:46,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:43:46,863 INFO L225 Difference]: With dead ends: 533 [2021-12-06 22:43:46,863 INFO L226 Difference]: Without dead ends: 353 [2021-12-06 22:43:46,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:43:46,865 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 12 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:43:46,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1465 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:43:46,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-06 22:43:46,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 349. [2021-12-06 22:43:46,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 230 states have (on average 1.1478260869565218) internal successors, (264), 239 states have internal predecessors, (264), 89 states have call successors, (89), 22 states have call predecessors, (89), 29 states have return successors, (155), 87 states have call predecessors, (155), 88 states have call successors, (155) [2021-12-06 22:43:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 508 transitions. [2021-12-06 22:43:46,885 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 508 transitions. Word has length 151 [2021-12-06 22:43:46,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:43:46,886 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 508 transitions. [2021-12-06 22:43:46,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-06 22:43:46,886 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 508 transitions. [2021-12-06 22:43:46,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-06 22:43:46,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:43:46,889 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:43:46,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 22:43:47,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:47,090 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:43:47,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:43:47,090 INFO L85 PathProgramCache]: Analyzing trace with hash 541296782, now seen corresponding path program 1 times [2021-12-06 22:43:47,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:43:47,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169189331] [2021-12-06 22:43:47,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:47,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:43:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:47,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:43:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:47,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:47,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:43:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:47,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:47,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:43:47,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:47,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:47,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:47,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:43:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:47,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:43:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:47,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:43:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:47,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:43:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:47,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:43:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:47,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 22:43:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:47,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:43:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:47,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 22:43:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:47,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 22:43:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:47,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-06 22:43:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:47,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:47,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:47,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-06 22:43:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-12-06 22:43:47,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:43:47,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169189331] [2021-12-06 22:43:47,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169189331] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:43:47,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103592756] [2021-12-06 22:43:47,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:47,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:47,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:43:47,754 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:43:47,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 22:43:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:48,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 2874 conjuncts, 60 conjunts are in the unsatisfiable core [2021-12-06 22:43:48,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:43:48,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:43:48,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:43:48,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:43:48,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:43:48,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:43:48,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:43:48,425 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 22:43:48,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 53 [2021-12-06 22:43:49,155 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 130 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 22:43:49,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:43:49,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-12-06 22:43:49,737 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-06 22:43:49,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-06 22:43:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-12-06 22:43:49,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103592756] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:43:49,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:43:49,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 13] total 36 [2021-12-06 22:43:49,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518435907] [2021-12-06 22:43:49,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:43:49,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 22:43:49,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:43:49,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 22:43:49,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 22:43:49,788 INFO L87 Difference]: Start difference. First operand 349 states and 508 transitions. Second operand has 36 states, 33 states have (on average 5.181818181818182) internal successors, (171), 33 states have internal predecessors, (171), 14 states have call successors, (46), 8 states have call predecessors, (46), 9 states have return successors, (44), 11 states have call predecessors, (44), 14 states have call successors, (44) [2021-12-06 22:43:52,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:43:52,865 INFO L93 Difference]: Finished difference Result 711 states and 998 transitions. [2021-12-06 22:43:52,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-12-06 22:43:52,866 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 5.181818181818182) internal successors, (171), 33 states have internal predecessors, (171), 14 states have call successors, (46), 8 states have call predecessors, (46), 9 states have return successors, (44), 11 states have call predecessors, (44), 14 states have call successors, (44) Word has length 153 [2021-12-06 22:43:52,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:43:52,870 INFO L225 Difference]: With dead ends: 711 [2021-12-06 22:43:52,870 INFO L226 Difference]: Without dead ends: 514 [2021-12-06 22:43:52,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 328 SyntacticMatches, 13 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=659, Invalid=3897, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 22:43:52,872 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 377 mSDsluCounter, 1884 mSDsCounter, 0 mSdLazyCounter, 3209 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 2085 SdHoareTripleChecker+Invalid, 4744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 3209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1309 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:43:52,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 2085 Invalid, 4744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 3209 Invalid, 0 Unknown, 1309 Unchecked, 2.0s Time] [2021-12-06 22:43:52,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-12-06 22:43:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 453. [2021-12-06 22:43:52,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 317 states have (on average 1.135646687697161) internal successors, (360), 328 states have internal predecessors, (360), 98 states have call successors, (98), 28 states have call predecessors, (98), 37 states have return successors, (172), 96 states have call predecessors, (172), 97 states have call successors, (172) [2021-12-06 22:43:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 630 transitions. [2021-12-06 22:43:52,897 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 630 transitions. Word has length 153 [2021-12-06 22:43:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:43:52,898 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 630 transitions. [2021-12-06 22:43:52,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 5.181818181818182) internal successors, (171), 33 states have internal predecessors, (171), 14 states have call successors, (46), 8 states have call predecessors, (46), 9 states have return successors, (44), 11 states have call predecessors, (44), 14 states have call successors, (44) [2021-12-06 22:43:52,898 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 630 transitions. [2021-12-06 22:43:52,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-06 22:43:52,900 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:43:52,900 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:43:52,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-06 22:43:53,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 22:43:53,101 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:43:53,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:43:53,101 INFO L85 PathProgramCache]: Analyzing trace with hash -497287792, now seen corresponding path program 2 times [2021-12-06 22:43:53,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:43:53,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359565760] [2021-12-06 22:43:53,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:43:53,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:43:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:53,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:43:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:53,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:53,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:43:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:53,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:53,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:43:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:53,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:53,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:43:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:53,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:43:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:53,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:43:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:53,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:43:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:53,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:43:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:53,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 22:43:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:53,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:43:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:53,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 22:43:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:53,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 22:43:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:53,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-06 22:43:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:53,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:43:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:53,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:43:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:53,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-06 22:43:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:43:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-06 22:43:53,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:43:53,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359565760] [2021-12-06 22:43:53,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359565760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:43:53,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571968343] [2021-12-06 22:43:53,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:43:53,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:43:53,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:43:53,670 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:43:53,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 22:43:54,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:43:54,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:43:54,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 2879 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 22:43:54,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:43:54,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:43:54,895 INFO L354 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2021-12-06 22:43:54,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 55 [2021-12-06 22:44:07,347 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.base| Int) (|v_ULTIMATE.start_aws_byte_buf_eq_~a#1.base_BEFORE_CALL_4| Int) (|ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.offset| Int)) (let ((.cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_eq_~a#1.base_BEFORE_CALL_4|) 0))) (and (not (= |v_ULTIMATE.start_aws_byte_buf_eq_~a#1.base_BEFORE_CALL_4| |ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.base|)) (= (select (select |c_#memory_int| |ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.base|) |ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.offset|) .cse0) (<= 1 (+ (* 18446744073709551616 (div (+ 18446744073709551615 (* .cse0 (- 1))) 18446744073709551616)) .cse0))))) is different from true [2021-12-06 22:44:10,829 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_eq_~a#1.base_BEFORE_CALL_6| Int) (|ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.base| Int) (|ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.offset| Int)) (let ((.cse0 (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_eq_~a#1.base_BEFORE_CALL_6|) 0))) (and (not (= |v_ULTIMATE.start_aws_byte_buf_eq_~a#1.base_BEFORE_CALL_6| |ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.base|)) (<= 1 (+ .cse0 (* 18446744073709551616 (div (+ (* .cse0 (- 1)) 18446744073709551615) 18446744073709551616)))) (= .cse0 (select (select |c_#memory_int| |ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.base|) |ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.offset|))))) is different from true [2021-12-06 22:44:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 66 proven. 22 refuted. 0 times theorem prover too weak. 17 trivial. 66 not checked. [2021-12-06 22:44:19,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:44:46,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571968343] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:44:46,954 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:44:46,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 35 [2021-12-06 22:44:46,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121409851] [2021-12-06 22:44:46,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:44:46,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 22:44:46,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:44:46,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 22:44:46,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1242, Unknown=13, NotChecked=146, Total=1560 [2021-12-06 22:44:46,956 INFO L87 Difference]: Start difference. First operand 453 states and 630 transitions. Second operand has 35 states, 31 states have (on average 4.870967741935484) internal successors, (151), 31 states have internal predecessors, (151), 13 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (35), 11 states have call predecessors, (35), 13 states have call successors, (35) [2021-12-06 22:44:54,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:44:54,988 INFO L93 Difference]: Finished difference Result 841 states and 1255 transitions. [2021-12-06 22:44:54,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 22:44:54,989 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 4.870967741935484) internal successors, (151), 31 states have internal predecessors, (151), 13 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (35), 11 states have call predecessors, (35), 13 states have call successors, (35) Word has length 153 [2021-12-06 22:44:54,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:44:54,992 INFO L225 Difference]: With dead ends: 841 [2021-12-06 22:44:54,992 INFO L226 Difference]: Without dead ends: 609 [2021-12-06 22:44:54,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 256 SyntacticMatches, 15 SemanticMatches, 63 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 56.5s TimeCoverageRelationStatistics Valid=553, Invalid=3347, Unknown=14, NotChecked=246, Total=4160 [2021-12-06 22:44:54,995 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 535 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 3552 mSolverCounterSat, 570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 6366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 3552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2244 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:44:54,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 1182 Invalid, 6366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 3552 Invalid, 0 Unknown, 2244 Unchecked, 2.4s Time] [2021-12-06 22:44:54,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2021-12-06 22:44:55,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 445. [2021-12-06 22:44:55,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 321 states have (on average 1.1277258566978192) internal successors, (362), 329 states have internal predecessors, (362), 86 states have call successors, (86), 31 states have call predecessors, (86), 37 states have return successors, (149), 84 states have call predecessors, (149), 85 states have call successors, (149) [2021-12-06 22:44:55,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 597 transitions. [2021-12-06 22:44:55,023 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 597 transitions. Word has length 153 [2021-12-06 22:44:55,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:44:55,023 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 597 transitions. [2021-12-06 22:44:55,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 4.870967741935484) internal successors, (151), 31 states have internal predecessors, (151), 13 states have call successors, (37), 10 states have call predecessors, (37), 10 states have return successors, (35), 11 states have call predecessors, (35), 13 states have call successors, (35) [2021-12-06 22:44:55,023 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 597 transitions. [2021-12-06 22:44:55,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-06 22:44:55,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:44:55,026 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:44:55,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 22:44:55,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 22:44:55,227 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:44:55,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:44:55,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1859895116, now seen corresponding path program 1 times [2021-12-06 22:44:55,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:44:55,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988610430] [2021-12-06 22:44:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:44:55,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:44:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:55,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:44:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:55,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:44:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:55,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:44:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:55,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:44:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:55,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:44:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:55,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:44:55,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:55,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:44:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:55,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:44:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:55,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:44:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:55,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:44:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:55,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:44:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:55,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:44:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:55,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 22:44:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:56,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 22:44:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:56,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 22:44:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:56,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 22:44:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:56,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 22:44:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:56,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:44:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:56,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:44:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:56,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-06 22:44:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 3 proven. 54 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2021-12-06 22:44:56,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:44:56,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988610430] [2021-12-06 22:44:56,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988610430] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:44:56,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793577319] [2021-12-06 22:44:56,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:44:56,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:44:56,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:44:56,219 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:44:56,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 22:44:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:44:56,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 2919 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 22:44:56,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:44:56,990 INFO L354 Elim1Store]: treesize reduction 288, result has 17.5 percent of original size [2021-12-06 22:44:56,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 81 [2021-12-06 22:44:57,107 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 22:44:57,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 34 [2021-12-06 22:44:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 118 proven. 8 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-06 22:44:57,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:44:57,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793577319] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:44:57,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:44:57,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 13] total 38 [2021-12-06 22:44:57,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764176283] [2021-12-06 22:44:57,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:44:57,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 22:44:57,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:44:57,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 22:44:57,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1515, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 22:44:57,681 INFO L87 Difference]: Start difference. First operand 445 states and 597 transitions. Second operand has 38 states, 33 states have (on average 4.242424242424242) internal successors, (140), 34 states have internal predecessors, (140), 17 states have call successors, (41), 7 states have call predecessors, (41), 10 states have return successors, (40), 15 states have call predecessors, (40), 17 states have call successors, (40) [2021-12-06 22:45:04,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:04,010 INFO L93 Difference]: Finished difference Result 868 states and 1307 transitions. [2021-12-06 22:45:04,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 22:45:04,011 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 4.242424242424242) internal successors, (140), 34 states have internal predecessors, (140), 17 states have call successors, (41), 7 states have call predecessors, (41), 10 states have return successors, (40), 15 states have call predecessors, (40), 17 states have call successors, (40) Word has length 160 [2021-12-06 22:45:04,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:04,015 INFO L225 Difference]: With dead ends: 868 [2021-12-06 22:45:04,015 INFO L226 Difference]: Without dead ends: 668 [2021-12-06 22:45:04,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 288 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1209 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=416, Invalid=4004, Unknown=2, NotChecked=0, Total=4422 [2021-12-06 22:45:04,017 INFO L933 BasicCegarLoop]: 177 mSDtfsCounter, 517 mSDsluCounter, 1592 mSDsCounter, 0 mSdLazyCounter, 4910 mSolverCounterSat, 653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1769 SdHoareTripleChecker+Invalid, 6097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 653 IncrementalHoareTripleChecker+Valid, 4910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 534 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:45:04,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 1769 Invalid, 6097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [653 Valid, 4910 Invalid, 0 Unknown, 534 Unchecked, 3.1s Time] [2021-12-06 22:45:04,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-12-06 22:45:04,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 562. [2021-12-06 22:45:04,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 392 states have (on average 1.1301020408163265) internal successors, (443), 400 states have internal predecessors, (443), 129 states have call successors, (129), 34 states have call predecessors, (129), 40 states have return successors, (235), 127 states have call predecessors, (235), 128 states have call successors, (235) [2021-12-06 22:45:04,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 807 transitions. [2021-12-06 22:45:04,055 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 807 transitions. Word has length 160 [2021-12-06 22:45:04,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:04,055 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 807 transitions. [2021-12-06 22:45:04,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 4.242424242424242) internal successors, (140), 34 states have internal predecessors, (140), 17 states have call successors, (41), 7 states have call predecessors, (41), 10 states have return successors, (40), 15 states have call predecessors, (40), 17 states have call successors, (40) [2021-12-06 22:45:04,056 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 807 transitions. [2021-12-06 22:45:04,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-06 22:45:04,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:04,059 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:04,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 22:45:04,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 22:45:04,259 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:45:04,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:04,260 INFO L85 PathProgramCache]: Analyzing trace with hash -453013936, now seen corresponding path program 2 times [2021-12-06 22:45:04,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:04,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358283354] [2021-12-06 22:45:04,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:04,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:04,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:45:04,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:04,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:45:04,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:04,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:45:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:04,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:04,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:45:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:04,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:04,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:45:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:04,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:45:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:04,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:45:04,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:04,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:45:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:04,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:45:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:04,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 22:45:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:04,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 22:45:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:04,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 22:45:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:04,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 22:45:04,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:04,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-06 22:45:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:04,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:04,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:45:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:04,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-06 22:45:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:04,902 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 30 proven. 35 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-06 22:45:04,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:04,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358283354] [2021-12-06 22:45:04,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358283354] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:45:04,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162587935] [2021-12-06 22:45:04,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:45:04,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:45:04,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:45:04,903 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:45:04,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 22:45:05,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:45:05,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:45:05,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 2869 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-06 22:45:05,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:45:07,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:45:07,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2021-12-06 22:45:07,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:45:07,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 21 [2021-12-06 22:45:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 26 proven. 113 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-06 22:45:07,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:45:08,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162587935] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:45:08,635 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:45:08,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 46 [2021-12-06 22:45:08,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231929733] [2021-12-06 22:45:08,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:45:08,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 22:45:08,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:08,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 22:45:08,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3058, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 22:45:08,638 INFO L87 Difference]: Start difference. First operand 562 states and 807 transitions. Second operand has 46 states, 42 states have (on average 4.166666666666667) internal successors, (175), 42 states have internal predecessors, (175), 16 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 12 states have call predecessors, (38), 15 states have call successors, (38) [2021-12-06 22:45:16,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:16,061 INFO L93 Difference]: Finished difference Result 1696 states and 2602 transitions. [2021-12-06 22:45:16,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-12-06 22:45:16,061 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 4.166666666666667) internal successors, (175), 42 states have internal predecessors, (175), 16 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 12 states have call predecessors, (38), 15 states have call successors, (38) Word has length 153 [2021-12-06 22:45:16,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:16,069 INFO L225 Difference]: With dead ends: 1696 [2021-12-06 22:45:16,070 INFO L226 Difference]: Without dead ends: 1430 [2021-12-06 22:45:16,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 194 SyntacticMatches, 15 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1358, Invalid=14898, Unknown=0, NotChecked=0, Total=16256 [2021-12-06 22:45:16,076 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 807 mSDsluCounter, 2659 mSDsCounter, 0 mSdLazyCounter, 7159 mSolverCounterSat, 791 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 2964 SdHoareTripleChecker+Invalid, 9060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 791 IncrementalHoareTripleChecker+Valid, 7159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1110 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:45:16,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 2964 Invalid, 9060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [791 Valid, 7159 Invalid, 0 Unknown, 1110 Unchecked, 4.2s Time] [2021-12-06 22:45:16,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2021-12-06 22:45:16,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1210. [2021-12-06 22:45:16,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 864 states have (on average 1.1342592592592593) internal successors, (980), 882 states have internal predecessors, (980), 268 states have call successors, (268), 61 states have call predecessors, (268), 77 states have return successors, (537), 266 states have call predecessors, (537), 266 states have call successors, (537) [2021-12-06 22:45:16,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1785 transitions. [2021-12-06 22:45:16,156 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1785 transitions. Word has length 153 [2021-12-06 22:45:16,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:16,157 INFO L470 AbstractCegarLoop]: Abstraction has 1210 states and 1785 transitions. [2021-12-06 22:45:16,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 4.166666666666667) internal successors, (175), 42 states have internal predecessors, (175), 16 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 12 states have call predecessors, (38), 15 states have call successors, (38) [2021-12-06 22:45:16,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1785 transitions. [2021-12-06 22:45:16,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-06 22:45:16,161 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:16,161 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:16,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 22:45:16,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 22:45:16,362 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:45:16,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:16,362 INFO L85 PathProgramCache]: Analyzing trace with hash 26111847, now seen corresponding path program 1 times [2021-12-06 22:45:16,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:16,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157194584] [2021-12-06 22:45:16,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:16,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:16,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:16,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:45:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:16,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:45:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:16,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:45:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:16,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:16,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:16,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:45:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:16,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:16,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:45:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:16,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:45:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:16,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:45:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:16,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:45:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:16,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:45:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:16,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:45:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:16,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 22:45:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:16,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-06 22:45:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:16,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-12-06 22:45:16,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:16,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-06 22:45:16,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:16,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-06 22:45:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:16,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:16,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:45:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:16,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-06 22:45:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-12-06 22:45:16,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:16,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157194584] [2021-12-06 22:45:16,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157194584] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:45:16,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275992220] [2021-12-06 22:45:16,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:16,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:45:16,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:45:16,704 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:45:16,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 22:45:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:17,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 2912 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 22:45:17,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:45:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-06 22:45:17,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:45:17,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275992220] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:45:17,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:45:17,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 13 [2021-12-06 22:45:17,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731030110] [2021-12-06 22:45:17,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:45:17,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 22:45:17,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:17,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 22:45:17,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:45:17,133 INFO L87 Difference]: Start difference. First operand 1210 states and 1785 transitions. Second operand has 9 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-12-06 22:45:17,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:17,274 INFO L93 Difference]: Finished difference Result 1856 states and 2713 transitions. [2021-12-06 22:45:17,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:45:17,275 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 158 [2021-12-06 22:45:17,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:17,280 INFO L225 Difference]: With dead ends: 1856 [2021-12-06 22:45:17,281 INFO L226 Difference]: Without dead ends: 1121 [2021-12-06 22:45:17,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:45:17,284 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 12 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:45:17,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 1463 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:45:17,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-12-06 22:45:17,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1111. [2021-12-06 22:45:17,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 808 states have (on average 1.1324257425742574) internal successors, (915), 824 states have internal predecessors, (915), 229 states have call successors, (229), 59 states have call predecessors, (229), 73 states have return successors, (434), 227 states have call predecessors, (434), 227 states have call successors, (434) [2021-12-06 22:45:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1578 transitions. [2021-12-06 22:45:17,344 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1578 transitions. Word has length 158 [2021-12-06 22:45:17,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:17,344 INFO L470 AbstractCegarLoop]: Abstraction has 1111 states and 1578 transitions. [2021-12-06 22:45:17,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 3 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-12-06 22:45:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1578 transitions. [2021-12-06 22:45:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-06 22:45:17,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:17,347 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:17,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 22:45:17,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:45:17,548 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:45:17,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:17,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2102429042, now seen corresponding path program 2 times [2021-12-06 22:45:17,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:17,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532262648] [2021-12-06 22:45:17,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:17,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:17,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:45:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:17,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:45:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:17,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:45:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:17,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:17,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:45:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:17,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:17,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:45:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:18,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:45:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:18,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:45:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:18,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:45:18,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:18,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:45:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:18,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:45:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:18,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 22:45:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:18,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-12-06 22:45:18,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:18,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 22:45:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:18,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 22:45:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:18,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 22:45:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:18,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:18,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:45:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:18,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-06 22:45:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-12-06 22:45:18,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:18,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532262648] [2021-12-06 22:45:18,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532262648] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:45:18,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651726021] [2021-12-06 22:45:18,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:45:18,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:45:18,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:45:18,167 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:45:18,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 22:45:19,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:45:19,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:45:19,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 2924 conjuncts, 69 conjunts are in the unsatisfiable core [2021-12-06 22:45:19,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:45:19,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:45:19,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:45:20,016 INFO L354 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2021-12-06 22:45:20,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 48 [2021-12-06 22:45:20,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:45:20,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-06 22:45:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-06 22:45:20,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:45:20,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651726021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:45:20,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:45:20,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [18] total 36 [2021-12-06 22:45:20,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986656226] [2021-12-06 22:45:20,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:45:20,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 22:45:20,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:20,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 22:45:20,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 22:45:20,308 INFO L87 Difference]: Start difference. First operand 1111 states and 1578 transitions. Second operand has 20 states, 18 states have (on average 4.722222222222222) internal successors, (85), 15 states have internal predecessors, (85), 7 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-06 22:45:21,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:21,371 INFO L93 Difference]: Finished difference Result 1727 states and 2456 transitions. [2021-12-06 22:45:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 22:45:21,372 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 4.722222222222222) internal successors, (85), 15 states have internal predecessors, (85), 7 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 160 [2021-12-06 22:45:21,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:21,378 INFO L225 Difference]: With dead ends: 1727 [2021-12-06 22:45:21,379 INFO L226 Difference]: Without dead ends: 1238 [2021-12-06 22:45:21,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 180 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=200, Invalid=2056, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 22:45:21,382 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 232 mSDsluCounter, 588 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 2770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1237 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:45:21,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 768 Invalid, 2770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 1348 Invalid, 0 Unknown, 1237 Unchecked, 0.8s Time] [2021-12-06 22:45:21,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-12-06 22:45:21,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1218. [2021-12-06 22:45:21,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 859 states have (on average 1.1338766006984866) internal successors, (974), 878 states have internal predecessors, (974), 277 states have call successors, (277), 64 states have call predecessors, (277), 81 states have return successors, (527), 275 states have call predecessors, (527), 274 states have call successors, (527) [2021-12-06 22:45:21,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1778 transitions. [2021-12-06 22:45:21,454 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1778 transitions. Word has length 160 [2021-12-06 22:45:21,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:21,454 INFO L470 AbstractCegarLoop]: Abstraction has 1218 states and 1778 transitions. [2021-12-06 22:45:21,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 4.722222222222222) internal successors, (85), 15 states have internal predecessors, (85), 7 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2021-12-06 22:45:21,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1778 transitions. [2021-12-06 22:45:21,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-06 22:45:21,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:21,458 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:21,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-06 22:45:21,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:45:21,659 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:45:21,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:21,659 INFO L85 PathProgramCache]: Analyzing trace with hash -318479342, now seen corresponding path program 2 times [2021-12-06 22:45:21,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:21,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781788959] [2021-12-06 22:45:21,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:21,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:21,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:45:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:21,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:45:21,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:21,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:45:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:22,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:22,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:45:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:22,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:22,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:45:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:22,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:45:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:22,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:45:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:22,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:45:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:22,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:45:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:22,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 22:45:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:22,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 22:45:22,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:22,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 22:45:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:22,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-06 22:45:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:22,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 22:45:22,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:22,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 22:45:22,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:22,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:22,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:45:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:22,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-06 22:45:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-12-06 22:45:22,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:22,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781788959] [2021-12-06 22:45:22,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781788959] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:45:22,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679421766] [2021-12-06 22:45:22,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:45:22,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:45:22,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:45:22,515 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:45:22,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 22:45:23,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:45:23,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:45:23,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 2914 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 22:45:23,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:45:23,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:45:23,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 22:45:23,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-06 22:45:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 122 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-06 22:45:24,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:45:24,224 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3100 (Array Int Int))) (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.base| v_ArrVal_3100) |c_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.base|) |c_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.offset|) 18446744073709551616) 0)) is different from false [2021-12-06 22:45:24,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679421766] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:45:24,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:45:24,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2021-12-06 22:45:24,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482289295] [2021-12-06 22:45:24,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:45:24,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 22:45:24,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:24,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 22:45:24,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1093, Unknown=1, NotChecked=66, Total=1260 [2021-12-06 22:45:24,230 INFO L87 Difference]: Start difference. First operand 1218 states and 1778 transitions. Second operand has 33 states, 29 states have (on average 4.655172413793103) internal successors, (135), 28 states have internal predecessors, (135), 16 states have call successors, (41), 6 states have call predecessors, (41), 10 states have return successors, (40), 14 states have call predecessors, (40), 16 states have call successors, (40) [2021-12-06 22:45:30,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:30,106 INFO L93 Difference]: Finished difference Result 2320 states and 3707 transitions. [2021-12-06 22:45:30,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 22:45:30,107 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 4.655172413793103) internal successors, (135), 28 states have internal predecessors, (135), 16 states have call successors, (41), 6 states have call predecessors, (41), 10 states have return successors, (40), 14 states have call predecessors, (40), 16 states have call successors, (40) Word has length 160 [2021-12-06 22:45:30,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:30,118 INFO L225 Difference]: With dead ends: 2320 [2021-12-06 22:45:30,118 INFO L226 Difference]: Without dead ends: 1782 [2021-12-06 22:45:30,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 281 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=432, Invalid=3353, Unknown=1, NotChecked=120, Total=3906 [2021-12-06 22:45:30,122 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 841 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 5179 mSolverCounterSat, 1252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 850 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 6767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1252 IncrementalHoareTripleChecker+Valid, 5179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 336 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:45:30,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [850 Valid, 1645 Invalid, 6767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1252 Valid, 5179 Invalid, 0 Unknown, 336 Unchecked, 4.7s Time] [2021-12-06 22:45:30,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2021-12-06 22:45:30,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1427. [2021-12-06 22:45:30,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1427 states, 1000 states have (on average 1.135) internal successors, (1135), 1025 states have internal predecessors, (1135), 335 states have call successors, (335), 68 states have call predecessors, (335), 91 states have return successors, (660), 333 states have call predecessors, (660), 332 states have call successors, (660) [2021-12-06 22:45:30,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1427 states to 1427 states and 2130 transitions. [2021-12-06 22:45:30,227 INFO L78 Accepts]: Start accepts. Automaton has 1427 states and 2130 transitions. Word has length 160 [2021-12-06 22:45:30,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:30,228 INFO L470 AbstractCegarLoop]: Abstraction has 1427 states and 2130 transitions. [2021-12-06 22:45:30,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 4.655172413793103) internal successors, (135), 28 states have internal predecessors, (135), 16 states have call successors, (41), 6 states have call predecessors, (41), 10 states have return successors, (40), 14 states have call predecessors, (40), 16 states have call successors, (40) [2021-12-06 22:45:30,228 INFO L276 IsEmpty]: Start isEmpty. Operand 1427 states and 2130 transitions. [2021-12-06 22:45:30,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-06 22:45:30,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:30,231 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:30,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 22:45:30,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 22:45:30,433 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:45:30,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:30,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1957535377, now seen corresponding path program 1 times [2021-12-06 22:45:30,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:30,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507902907] [2021-12-06 22:45:30,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:30,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:30,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:30,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:45:30,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:30,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:45:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:30,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:45:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:30,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:30,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:45:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:30,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:30,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:45:30,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:30,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:45:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:30,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:45:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:30,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:45:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:30,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:45:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:30,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 22:45:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:31,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:45:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:31,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-06 22:45:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:31,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-06 22:45:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:31,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-06 22:45:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:31,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-06 22:45:31,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:31,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-06 22:45:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:31,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:31,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:45:31,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:31,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-06 22:45:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-12-06 22:45:31,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:31,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507902907] [2021-12-06 22:45:31,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507902907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:45:31,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:45:31,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-12-06 22:45:31,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335038193] [2021-12-06 22:45:31,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:45:31,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 22:45:31,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:31,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 22:45:31,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-12-06 22:45:31,227 INFO L87 Difference]: Start difference. First operand 1427 states and 2130 transitions. Second operand has 23 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 11 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (21), 10 states have call predecessors, (21), 11 states have call successors, (21) [2021-12-06 22:45:33,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:33,143 INFO L93 Difference]: Finished difference Result 1926 states and 2966 transitions. [2021-12-06 22:45:33,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 22:45:33,143 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 11 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (21), 10 states have call predecessors, (21), 11 states have call successors, (21) Word has length 162 [2021-12-06 22:45:33,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:33,152 INFO L225 Difference]: With dead ends: 1926 [2021-12-06 22:45:33,152 INFO L226 Difference]: Without dead ends: 1517 [2021-12-06 22:45:33,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=1025, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 22:45:33,155 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 310 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 2552 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 2874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 2552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:45:33,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 919 Invalid, 2874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 2552 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 22:45:33,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-12-06 22:45:33,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1444. [2021-12-06 22:45:33,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1444 states, 1006 states have (on average 1.1341948310139165) internal successors, (1141), 1031 states have internal predecessors, (1141), 346 states have call successors, (346), 68 states have call predecessors, (346), 91 states have return successors, (657), 344 states have call predecessors, (657), 343 states have call successors, (657) [2021-12-06 22:45:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 2144 transitions. [2021-12-06 22:45:33,253 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 2144 transitions. Word has length 162 [2021-12-06 22:45:33,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:33,253 INFO L470 AbstractCegarLoop]: Abstraction has 1444 states and 2144 transitions. [2021-12-06 22:45:33,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 18 states have internal predecessors, (64), 11 states have call successors, (22), 5 states have call predecessors, (22), 5 states have return successors, (21), 10 states have call predecessors, (21), 11 states have call successors, (21) [2021-12-06 22:45:33,253 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 2144 transitions. [2021-12-06 22:45:33,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-06 22:45:33,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:33,257 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:33,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 22:45:33,257 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:45:33,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:33,257 INFO L85 PathProgramCache]: Analyzing trace with hash 218384932, now seen corresponding path program 1 times [2021-12-06 22:45:33,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:33,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364102265] [2021-12-06 22:45:33,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:33,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:33,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:45:33,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:33,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:45:33,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:33,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:45:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:33,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:33,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:45:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:33,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:33,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:45:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:33,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:45:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:33,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:45:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:33,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:45:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:33,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 22:45:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:33,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-06 22:45:33,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:34,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-06 22:45:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:34,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-06 22:45:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:34,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-06 22:45:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:34,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-06 22:45:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:34,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-06 22:45:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:34,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:45:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:34,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:45:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:34,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-06 22:45:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-12-06 22:45:34,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:34,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364102265] [2021-12-06 22:45:34,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364102265] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:45:34,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172833339] [2021-12-06 22:45:34,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:34,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:45:34,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:45:34,055 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:45:34,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 22:45:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:34,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 2922 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-06 22:45:34,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:45:34,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:45:38,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:45:38,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:45:38,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:45:38,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:45:38,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:45:38,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:45:38,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 48 [2021-12-06 22:45:38,887 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_3444 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |c_save_byte_from_array_~storage#1.base| v_ArrVal_3444))) is different from true [2021-12-06 22:45:38,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 22:45:38,896 WARN L860 $PredicateComparison]: unable to prove that (exists ((|save_byte_from_array_~storage#1.base| Int) (v_ArrVal_3445 (Array Int Int))) (= |c_#memory_int| (store |c_old(#memory_int)| |save_byte_from_array_~storage#1.base| v_ArrVal_3445))) is different from true [2021-12-06 22:45:38,921 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-12-06 22:45:38,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 39 [2021-12-06 22:45:38,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 22:45:38,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-06 22:45:40,941 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_eq_~b#1.base_BEFORE_CALL_19| Int) (|v_ULTIMATE.start_aws_byte_buf_eq_~a#1.base_BEFORE_CALL_22| Int)) (and (or (not (= (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_eq_~a#1.base_BEFORE_CALL_22|) 0) 18446744073709551616) 0)) (not (= (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_eq_~b#1.base_BEFORE_CALL_19|) 0) 18446744073709551616) 0))) (not (= |v_ULTIMATE.start_aws_byte_buf_eq_~a#1.base_BEFORE_CALL_22| |v_ULTIMATE.start_aws_byte_buf_eq_~b#1.base_BEFORE_CALL_19|)))) is different from true [2021-12-06 22:45:43,052 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_eq_~b#1.base_BEFORE_CALL_20| Int) (|v_ULTIMATE.start_aws_byte_buf_eq_~a#1.base_BEFORE_CALL_23| Int)) (and (not (= |v_ULTIMATE.start_aws_byte_buf_eq_~a#1.base_BEFORE_CALL_23| |v_ULTIMATE.start_aws_byte_buf_eq_~b#1.base_BEFORE_CALL_20|)) (or (not (= (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_eq_~b#1.base_BEFORE_CALL_20|) 0) 18446744073709551616) 0)) (not (= (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_eq_~a#1.base_BEFORE_CALL_23|) 0) 18446744073709551616) 0))))) is different from true [2021-12-06 22:45:45,050 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_aws_byte_buf_eq_~b#1.base_BEFORE_CALL_21| Int) (|v_ULTIMATE.start_aws_byte_buf_eq_~a#1.base_BEFORE_CALL_24| Int)) (and (or (not (= 0 (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_eq_~b#1.base_BEFORE_CALL_21|) 0) 18446744073709551616))) (not (= (mod (select (select |c_#memory_int| |v_ULTIMATE.start_aws_byte_buf_eq_~a#1.base_BEFORE_CALL_24|) 0) 18446744073709551616) 0))) (not (= |v_ULTIMATE.start_aws_byte_buf_eq_~a#1.base_BEFORE_CALL_24| |v_ULTIMATE.start_aws_byte_buf_eq_~b#1.base_BEFORE_CALL_21|)))) is different from true [2021-12-06 22:45:49,572 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 22:45:49,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-12-06 22:45:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 84 proven. 28 refuted. 8 times theorem prover too weak. 42 trivial. 37 not checked. [2021-12-06 22:45:49,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:45:53,685 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_save_byte_from_array_~storage#1.base_51| Int) (v_ArrVal_3449 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |v_save_byte_from_array_~storage#1.base_51| v_ArrVal_3449))) (or (not (= (mod (select (select .cse0 |c_ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.base|) |c_ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.offset|) 18446744073709551616) 0)) (not (= (mod (select (select .cse0 |c_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.base|) |c_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.offset|) 18446744073709551616) 0))))) is different from false [2021-12-06 22:45:53,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172833339] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:45:53,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:45:53,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26] total 44 [2021-12-06 22:45:53,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574840552] [2021-12-06 22:45:53,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:45:53,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 22:45:53,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:53,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 22:45:53,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2102, Unknown=9, NotChecked=582, Total=2862 [2021-12-06 22:45:53,688 INFO L87 Difference]: Start difference. First operand 1444 states and 2144 transitions. Second operand has 44 states, 40 states have (on average 3.95) internal successors, (158), 37 states have internal predecessors, (158), 16 states have call successors, (41), 11 states have call predecessors, (41), 15 states have return successors, (40), 14 states have call predecessors, (40), 16 states have call successors, (40) [2021-12-06 22:46:25,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:25,408 INFO L93 Difference]: Finished difference Result 2214 states and 3282 transitions. [2021-12-06 22:46:25,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 22:46:25,409 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 40 states have (on average 3.95) internal successors, (158), 37 states have internal predecessors, (158), 16 states have call successors, (41), 11 states have call predecessors, (41), 15 states have return successors, (40), 14 states have call predecessors, (40), 16 states have call successors, (40) Word has length 161 [2021-12-06 22:46:25,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:25,421 INFO L225 Difference]: With dead ends: 2214 [2021-12-06 22:46:25,421 INFO L226 Difference]: Without dead ends: 1645 [2021-12-06 22:46:25,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 249 SyntacticMatches, 16 SemanticMatches, 80 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=517, Invalid=5193, Unknown=14, NotChecked=918, Total=6642 [2021-12-06 22:46:25,425 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 494 mSDsluCounter, 2260 mSDsCounter, 0 mSdLazyCounter, 5997 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 2481 SdHoareTripleChecker+Invalid, 10765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 5997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4162 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:25,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 2481 Invalid, 10765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 5997 Invalid, 0 Unknown, 4162 Unchecked, 4.1s Time] [2021-12-06 22:46:25,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2021-12-06 22:46:25,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1424. [2021-12-06 22:46:25,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1017 states have (on average 1.1307767944936087) internal successors, (1150), 1038 states have internal predecessors, (1150), 314 states have call successors, (314), 73 states have call predecessors, (314), 92 states have return successors, (576), 312 states have call predecessors, (576), 311 states have call successors, (576) [2021-12-06 22:46:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 2040 transitions. [2021-12-06 22:46:25,533 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 2040 transitions. Word has length 161 [2021-12-06 22:46:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:25,533 INFO L470 AbstractCegarLoop]: Abstraction has 1424 states and 2040 transitions. [2021-12-06 22:46:25,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 40 states have (on average 3.95) internal successors, (158), 37 states have internal predecessors, (158), 16 states have call successors, (41), 11 states have call predecessors, (41), 15 states have return successors, (40), 14 states have call predecessors, (40), 16 states have call successors, (40) [2021-12-06 22:46:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 2040 transitions. [2021-12-06 22:46:25,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-06 22:46:25,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:25,536 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:25,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 22:46:25,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:25,737 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:46:25,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:25,737 INFO L85 PathProgramCache]: Analyzing trace with hash -107654360, now seen corresponding path program 1 times [2021-12-06 22:46:25,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:25,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416071862] [2021-12-06 22:46:25,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:25,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:25,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:46:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:25,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:46:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:25,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:46:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:25,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:46:25,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:25,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:46:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:25,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:46:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:25,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:46:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:25,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:46:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:25,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:46:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:25,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:46:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:25,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:46:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:25,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 22:46:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:26,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 22:46:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:26,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 22:46:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:26,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 22:46:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:26,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-06 22:46:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:26,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:46:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:26,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:46:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:26,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-06 22:46:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:26,112 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-06 22:46:26,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:26,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416071862] [2021-12-06 22:46:26,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416071862] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:26,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392639888] [2021-12-06 22:46:26,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:26,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:26,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:26,113 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:26,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 22:46:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:26,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 2874 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 22:46:26,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:26,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:46:26,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:26,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:26,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:26,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 32 [2021-12-06 22:46:26,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-12-06 22:46:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-06 22:46:27,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:46:27,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392639888] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:46:27,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:46:27,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [13] total 27 [2021-12-06 22:46:27,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575752766] [2021-12-06 22:46:27,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:46:27,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-06 22:46:27,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:27,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-06 22:46:27,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2021-12-06 22:46:27,290 INFO L87 Difference]: Start difference. First operand 1424 states and 2040 transitions. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 7 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2021-12-06 22:46:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:27,872 INFO L93 Difference]: Finished difference Result 1643 states and 2297 transitions. [2021-12-06 22:46:27,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 22:46:27,873 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 7 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 154 [2021-12-06 22:46:27,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:27,879 INFO L225 Difference]: With dead ends: 1643 [2021-12-06 22:46:27,879 INFO L226 Difference]: Without dead ends: 1419 [2021-12-06 22:46:27,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 173 SyntacticMatches, 10 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=1200, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 22:46:27,881 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 118 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 337 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:27,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 1281 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 611 Invalid, 0 Unknown, 337 Unchecked, 0.4s Time] [2021-12-06 22:46:27,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-12-06 22:46:27,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1411. [2021-12-06 22:46:27,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1411 states, 1008 states have (on average 1.130952380952381) internal successors, (1140), 1028 states have internal predecessors, (1140), 311 states have call successors, (311), 73 states have call predecessors, (311), 91 states have return successors, (570), 309 states have call predecessors, (570), 308 states have call successors, (570) [2021-12-06 22:46:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 2021 transitions. [2021-12-06 22:46:27,967 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 2021 transitions. Word has length 154 [2021-12-06 22:46:27,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:27,968 INFO L470 AbstractCegarLoop]: Abstraction has 1411 states and 2021 transitions. [2021-12-06 22:46:27,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 15 states have internal predecessors, (85), 7 states have call successors, (20), 4 states have call predecessors, (20), 7 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2021-12-06 22:46:27,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 2021 transitions. [2021-12-06 22:46:27,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-06 22:46:27,971 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:27,971 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:27,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-06 22:46:28,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:28,172 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:46:28,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:28,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1057371548, now seen corresponding path program 1 times [2021-12-06 22:46:28,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:28,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867228606] [2021-12-06 22:46:28,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:28,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:28,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:46:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:28,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:46:28,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:28,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:46:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:28,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:46:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:28,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:46:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:28,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:46:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:28,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:46:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:28,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:46:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:28,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:46:28,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:28,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:46:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:28,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:46:28,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:28,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 22:46:28,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:28,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-06 22:46:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:28,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 22:46:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:28,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-06 22:46:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:28,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-06 22:46:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:28,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:46:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:28,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:46:28,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:28,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-06 22:46:28,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-12-06 22:46:28,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:28,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867228606] [2021-12-06 22:46:28,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867228606] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:28,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687480268] [2021-12-06 22:46:28,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:28,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:28,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:28,774 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:28,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 22:46:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:29,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 2872 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 22:46:29,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:29,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:46:29,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:46:29,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-06 22:46:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 71 proven. 39 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-06 22:46:30,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:30,879 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3746 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_aws_byte_buf_eq_harness_~#rhs~0#1.base| v_ArrVal_3746) |c_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.base|) (+ 16 |c_ULTIMATE.start_aws_byte_buf_eq_harness_~#lhs~0#1.offset|)) 18446744073709551616) 0))) is different from false [2021-12-06 22:46:30,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687480268] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:30,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 22:46:30,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2021-12-06 22:46:30,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271650197] [2021-12-06 22:46:30,885 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:30,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 22:46:30,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:30,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 22:46:30,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1360, Unknown=1, NotChecked=74, Total=1560 [2021-12-06 22:46:30,886 INFO L87 Difference]: Start difference. First operand 1411 states and 2021 transitions. Second operand has 33 states, 30 states have (on average 4.8) internal successors, (144), 29 states have internal predecessors, (144), 14 states have call successors, (37), 7 states have call predecessors, (37), 9 states have return successors, (36), 12 states have call predecessors, (36), 14 states have call successors, (36) [2021-12-06 22:46:33,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:33,560 INFO L93 Difference]: Finished difference Result 1801 states and 2514 transitions. [2021-12-06 22:46:33,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 22:46:33,561 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 4.8) internal successors, (144), 29 states have internal predecessors, (144), 14 states have call successors, (37), 7 states have call predecessors, (37), 9 states have return successors, (36), 12 states have call predecessors, (36), 14 states have call successors, (36) Word has length 154 [2021-12-06 22:46:33,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:33,571 INFO L225 Difference]: With dead ends: 1801 [2021-12-06 22:46:33,572 INFO L226 Difference]: Without dead ends: 1426 [2021-12-06 22:46:33,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 255 SyntacticMatches, 17 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=609, Invalid=4086, Unknown=1, NotChecked=134, Total=4830 [2021-12-06 22:46:33,575 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 402 mSDsluCounter, 2106 mSDsCounter, 0 mSdLazyCounter, 2926 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 2347 SdHoareTripleChecker+Invalid, 4493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 2926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1384 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:33,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 2347 Invalid, 4493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 2926 Invalid, 0 Unknown, 1384 Unchecked, 1.5s Time] [2021-12-06 22:46:33,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-12-06 22:46:33,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1368. [2021-12-06 22:46:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 973 states have (on average 1.1305241521068858) internal successors, (1100), 992 states have internal predecessors, (1100), 304 states have call successors, (304), 73 states have call predecessors, (304), 90 states have return successors, (551), 302 states have call predecessors, (551), 301 states have call successors, (551) [2021-12-06 22:46:33,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 1955 transitions. [2021-12-06 22:46:33,682 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 1955 transitions. Word has length 154 [2021-12-06 22:46:33,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:33,682 INFO L470 AbstractCegarLoop]: Abstraction has 1368 states and 1955 transitions. [2021-12-06 22:46:33,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 4.8) internal successors, (144), 29 states have internal predecessors, (144), 14 states have call successors, (37), 7 states have call predecessors, (37), 9 states have return successors, (36), 12 states have call predecessors, (36), 14 states have call successors, (36) [2021-12-06 22:46:33,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 1955 transitions. [2021-12-06 22:46:33,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-06 22:46:33,685 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:33,685 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:33,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-12-06 22:46:33,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 22:46:33,886 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:46:33,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:33,887 INFO L85 PathProgramCache]: Analyzing trace with hash -836915527, now seen corresponding path program 1 times [2021-12-06 22:46:33,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:33,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998146034] [2021-12-06 22:46:33,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:33,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:34,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 22:46:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:34,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:46:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:34,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-06 22:46:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:34,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:46:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:34,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 22:46:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:34,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:46:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:34,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-06 22:46:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:34,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 22:46:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:34,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-06 22:46:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:34,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-06 22:46:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:34,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-06 22:46:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:34,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-06 22:46:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:34,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-06 22:46:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:34,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-06 22:46:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:34,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-06 22:46:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:34,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-06 22:46:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:34,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 22:46:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:34,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 22:46:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:34,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-06 22:46:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 44 proven. 23 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 22:46:34,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:34,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998146034] [2021-12-06 22:46:34,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998146034] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:34,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747586589] [2021-12-06 22:46:34,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:34,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:34,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:34,351 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:34,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0aaee95-742b-4487-99ce-819d8d18ca1e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 22:46:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:34,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 92 conjunts are in the unsatisfiable core [2021-12-06 22:46:34,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:34,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 22:46:34,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:46:35,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:46:35,178 INFO L354 Elim1Store]: treesize reduction 157, result has 14.2 percent of original size [2021-12-06 22:46:35,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 42 [2021-12-06 22:46:35,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-12-06 22:46:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 39 proven. 100 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 22:46:37,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:55,253 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 22:46:55,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1710155 treesize of output 1639883 [2021-12-06 22:48:58,944 WARN L227 SmtUtils]: Spent 2.06m on a formula simplification. DAG size of input: 926 DAG size of output: 902 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:49:57,540 WARN L227 SmtUtils]: Spent 53.70s on a formula simplification. DAG size of input: 842 DAG size of output: 842 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:50:21,426 WARN L227 SmtUtils]: Spent 6.39s on a formula simplification that was a NOOP. DAG size: 646 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:51:22,363 WARN L227 SmtUtils]: Spent 6.91s on a formula simplification. DAG size of input: 459 DAG size of output: 459 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:51:37,943 WARN L227 SmtUtils]: Spent 11.47s on a formula simplification. DAG size of input: 459 DAG size of output: 459 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:52:57,598 WARN L227 SmtUtils]: Spent 9.85s on a formula simplification. DAG size of input: 438 DAG size of output: 438 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:53:06,884 WARN L227 SmtUtils]: Spent 5.71s on a formula simplification. DAG size of input: 436 DAG size of output: 436 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:53:22,801 WARN L227 SmtUtils]: Spent 7.90s on a formula simplification. DAG size of input: 434 DAG size of output: 434 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:53:33,495 WARN L227 SmtUtils]: Spent 6.91s on a formula simplification. DAG size of input: 436 DAG size of output: 436 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:53:45,426 WARN L227 SmtUtils]: Spent 8.14s on a formula simplification. DAG size of input: 434 DAG size of output: 434 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:53:57,279 WARN L227 SmtUtils]: Spent 8.00s on a formula simplification. DAG size of input: 434 DAG size of output: 434 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:54:16,011 WARN L227 SmtUtils]: Spent 7.03s on a formula simplification. DAG size of input: 436 DAG size of output: 436 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:54:24,855 WARN L227 SmtUtils]: Spent 5.00s on a formula simplification. DAG size of input: 434 DAG size of output: 434 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:54:34,749 WARN L227 SmtUtils]: Spent 7.02s on a formula simplification. DAG size of input: 436 DAG size of output: 436 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:54:46,530 WARN L227 SmtUtils]: Spent 6.96s on a formula simplification. DAG size of input: 436 DAG size of output: 436 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:54:58,427 WARN L227 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 434 DAG size of output: 434 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:55:08,374 WARN L227 SmtUtils]: Spent 7.05s on a formula simplification. DAG size of input: 436 DAG size of output: 436 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:55:21,221 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 434 DAG size of output: 434 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:55:33,147 WARN L227 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 434 DAG size of output: 434 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:55:43,000 WARN L227 SmtUtils]: Spent 5.03s on a formula simplification. DAG size of input: 434 DAG size of output: 434 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:55:52,976 WARN L227 SmtUtils]: Spent 7.09s on a formula simplification. DAG size of input: 436 DAG size of output: 436 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:56:05,961 WARN L227 SmtUtils]: Spent 9.12s on a formula simplification. DAG size of input: 434 DAG size of output: 434 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:56:20,017 WARN L227 SmtUtils]: Spent 10.18s on a formula simplification. DAG size of input: 436 DAG size of output: 436 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:56:31,903 WARN L227 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 434 DAG size of output: 434 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:56:42,882 WARN L227 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 434 DAG size of output: 434 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:56:54,774 WARN L227 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 434 DAG size of output: 434 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 22:57:16,802 WARN L227 SmtUtils]: Spent 6.87s on a formula simplification. DAG size of input: 438 DAG size of output: 438 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)